What is the most popular month for birthdays?

The most popular month for a birthday is statistically August. This could coincide with wintry conditions nine months earlier.

However, multiple sources point to October 5th (or possibly 10th) as the most common birthday in the US. It is suggested that it falls a convenient period after New Years Day. However, a normal pregnancy of 38 weeks would yield September 23 (266th day of the year).